Ignition apparatus of gas-engines.



C. S. SYDENHAM. IGNHmv APPARATUS of GAS ENGINES.

PPLICATION FILED FE8.1.7,914. ygmlg Failn' Jun@ 12, 1917.

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- crnnijnsrnucnn srDENHAM 0F KILMAnNocK, SCOTLAND.

" IGNITION APPRATUS OF GAS-ENGINES.

`To allwzomtha/canteras j t Be it known that ICLAU'nn SPENCER* `SYDENHAM,:a subject i of` the` King of Great- Britain a'nd'lrelanch and `a resident of Kilmarnocky Scotland, electrician,- have `in- ,ventedv newn and fuseul.` Improyeinents x 1n lgnition1-Appa1atus. *of` GasflEngines, `of which: the'following `isa specification. i i

This'in'ventionhas referencefto improve- A ments in ftheignition `apparatus ofrgas en gines, of; the-4 type having ,astatitonary' insulated. electrode and a -moving uninsulated -Hitherto `withitiliis ignition contacts usually employed in; these engines and particularly when suchjare driven by suction gas, therehas been a degreeofuncertainty associated with theiiuworki'ng.

According to t'he improvements vof this invention the stationary electrode is insulated at its inner end by an insulating washer carvried by'a cup between which and the igni- I tion plug asbestos or like packing is ar ranged so as to make a gastightjointz and a cup, which is-formed with holes so as to ventilate the air space surrounding the sta^ tionary electrode so as to allow full scope qualitiesl of mica, carries the insulating for expansion and contraction of the dry' air and thus overcome the objections of con* densation of moisture which by saturation or capillary a'ctiondestroys the insulating washer at the outer end'of the said electrode and. this cup is also formed with an extended flange to act asia shield to protect the mica washer from oil splashings and other moisture which permeating the mica layers destroys the insulating properties of same, and a metal collar coated with porcelain, rust proof shellac or the like is arranged on the Washer to minimize the probability of mois .ture setting on same.

, In order that others skilled in the art to which my invention relates may properly understand same I have hereunto appended one sheet of explanatory drawings in which Figure 1 is a'sectional elevation and Fig. 2 a plan View of ignition apparatus of as en'- gines as constructed accrding to t e improvements of this invention.

Referring to ythese 'drawings In carrying the improvements of this invention into eect. or practice themica washer l at the top of th'e stationary' contact rod 2 is supported by a brassr gun metal journal or cup 3 arranged on the fa'ce of the the square corner of spindle.

Specification of Letters Patent. Patented Jun@ 12, 19H; T?, Application sied February i?, 1914. serial no. $19,197. i

plug 4 around the opening 5 through which the rod 2 is passed. Holes 6 are formed y through the cup 3 so. as to efliciently ventilate `the space o r openingr 5 and thus provide `a dry andreliable insulation of rod 2. A

steehcollar 'Tycoated with porcelain, 4rust proof' lshellac or the like is mounte'd vQn the top'o'flthemica washer 1 so as to minimize the probability 'o`f`the condensation setting is formed 'byan extension of the flange of 'thecup 3. 'V

VThe mica washer 12 at the lower end of thci'od 2 "'is`carrie'd` between aA head 13 o'n said rod aiulaqnetal cup or holder I4. A

y gas `tight joint is made between the cup lll and the innerface of theplug 4 by the insertionpf a ring 15 of asbestos, copper asbestos or other suitable material.

The spindle 16 and foot 17 'of the moving,

rectangular part of same; preferably tas pered, is preferably prevented from working 'slack on 'the spindle by means of a pinching yscrew 19 preferably not less than an inch passing through eye of crank 18 to bear on The usual spring connection Q0 is taken from a pin 21 on the crank 18 to a pin 22 secured in the plug 4.-.

The eXtra return Contact Q3 which is taken from the top of spindle 16 is preferably titted between. nuts 24, and this contact Which consists f a stranded flexible steel or copper Wire or vthe like has itsother end metall lic'ally connected. with nietal frame of magneto, or some other convenient place on water jacket of engine, thus insuring perfeet metallic contact throughout with consequent full pressure of current developed' by magneto being arced between contact points with uixvarying density.

f .What 1 claim and desire to secure by Letters Patent is;-

2. In ignition apparatus the combination of a supporting structure having a cavity; an electrode extending therethrough; means for supporting said electrode including an insulating washer holding the electrode spaced away from the walls of the cavity in which it is mounted; and a structurally independent metal collar having a rust proo'l coating mounted on the insulatingwasher surrounding but spaced away from the electrede.

3. In ignition apparatus the combination of a plug having an opening therethrough; an electrode passing through said opening; insulating washers adjacent each end of the electrode; with removable cup shaped journal members receiving the washers and engaging the plug in positions to hold the eloctrode spaced away from the walls of the opening. 4

4. In ignition apparatus the combination of a plug having an opening therethrough; an electrode passing through said opening; insulating washers adjacent each end of the electrode; with cup shaped journals receiving the washers and engaging the plug in positions to hold the electrode spaced away from the Valls of the opening; there being Ventilating passages through the walls of the outer journal opening into the space surrounding the electrode.

5. In ignition apparatus the combination of a plug having two openings therethrough; an uninsulated electrode passing through and closely fitting one 0l said openings and having a projecting foot; journals adjacent the ends of the other opening; insulating washers mounted respectively in said journals; an electrode passing through the opening and held hy the washers away from the walls thereof in position to he engaged by the foot ot' the first electrode, said second electrode having a head at that end adjacent the foot of the other electrode; and means at the opposite end of the second elec. trode engaging one of the insulating washers to clamp the journals; washers and electrode in place, there being VVentilating passages through the outer one of the journals opening into the cavity in which the second electrode is mounted.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

GLAUDE SIENCER SYDENHAM.

Witnesses JOHN Sinn, JOHN STEWART. 

